Device for coating sound-absorbing material on inner wall of sound cavity of earphone

Abstract

The invention relates to the technical field of earphone production and processing, in particular to an earphone sound cavity inner wall sound absorbing material coating device. The invention provides the device for coating the sound-absorbing material on the inner wall of the earphone sound cavity, which can detect the coating condition of the inner wall of the earphone sound cavity, can carry out supplementary coating on the inner wall of the earphone sound cavity when the inner wall of the earphone sound cavity is not completely coated, and ensures the production quality of earphones. An earphone sound cavity inner wall sound absorbing material coating device comprises a connecting frame, a feeding assembly and the like, and the feeding assembly is arranged on the connecting frame. When the detection head detects that the coating of the inner wall of the sound cavity is unqualified, a second motor is controlled to be started, a rotating plate rotates to seal a connecting plate, and an earphone with unqualified coating cannot be separated from a connecting clamping plate and moves to a spray head again along with the connecting clamping plate to be coated again, so that the coating condition of the inner wall of the sound cavity of the earphone can be detected; and when the inner wall of the earphone sound cavity is not completely coated, the earphone sound cavity can be subjected to supplementary coating, so that the production quality of the earphone is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of earphone production and processing, and in particular to a device for coating an inner wall of an earphone sound cavity with a sound-absorbing material. Background Art

[0002] Headphones are an electronic audio device that converts electrical signals into sound signals, allowing users to listen to music, watch movies, play games, or make voice calls in a private manner. Coating the inner wall of the headphone sound cavity with sound-absorbing material is an important step in improving the acoustic performance of the headphone, which can reduce resonance and echo and improve sound quality. In the prior art, the coating of the sound-absorbing material on the inner wall of the headphone sound cavity is to fix the headphone and then spray the sound-absorbing material onto the inner wall of the headphone sound cavity through a coating nozzle, thereby completing the coating of the sound-absorbing material on the inner wall of the headphone sound cavity. However, when the coating nozzle is spraying the inner wall of the headphone sound cavity, the coating of the sound-absorbing material may be incomplete, which reduces the production quality of the headphone.

[0003] Therefore, a device for coating the inner wall of the earphone sound cavity with sound-absorbing material has been developed, which can detect the coating condition of the inner wall of the earphone sound cavity and re-coat the inner wall of the earphone sound cavity when the coating is incomplete, thereby ensuring the production quality of the earphone. Summary of the invention

[0004] In order to overcome the disadvantage that the sound-absorbing material may not be completely coated when the coating nozzle is spraying the inner wall of the earphone sound cavity, thereby reducing the production quality of the earphone, the present invention provides a device for coating the inner wall of the earphone sound cavity with sound-absorbing material, which can detect the coating condition of the inner wall of the earphone sound cavity and can re-coat the inner wall of the earphone sound cavity when the coating is incomplete, thereby ensuring the production quality of the earphone.

[0005] The technical implementation scheme of the present invention is: a device for coating the inner wall of the sound cavity of an earphone with sound-absorbing material, comprising a connecting frame, a feeding assembly, a unloading assembly, a detection assembly and a coating assembly, the connecting frame is provided with a feeding assembly capable of conveying the earphone shell, the feeding assembly is provided with a unloading assembly capable of removing the earphone shell, the connecting frame is also provided with a detection assembly capable of detecting the coating condition of the earphone, and the rear part of the connecting frame is provided with a coating assembly capable of adapting to different models of earphones.

[0006] In a preferred embodiment of the present invention, the feeding assembly includes a first motor, a conveyor belt, a connecting splint, a guide bevel block, a first spring, a guide column, a second spring, a connecting guide clamp block, a third spring and a connecting plate. The first motor is connected to the upper right part of the connecting frame. The front part of the connecting frame is rotatably provided with left and right rotating shafts, and the conveyor belt is wound around the rotating shafts. The output shaft of the first motor is connected to the rotating shaft on the right side. A plurality of connecting splints are connected to the conveyor belt. The connecting splints are all slidably connected with guide bevel blocks. The guide bevel blocks are all connected to the connected connecting splints with the first spring. The connecting splints are all slidably connected with guide columns. The guide columns are all squeezed and matched with adjacent guide bevel blocks. The guide columns are all connected to the connected connecting splints with the second spring. The guide columns are all slidably connected with connecting The guide clamp block is connected, and a third spring is connected between the connecting guide clamp blocks and the connected guide columns. A connecting plate is connected to the upper part of the connecting frame. The guide bevel blocks are squeezed and matched with the connecting plate, so that the staff can place the earphone shell on the connecting clamp plate located at the notch of the connecting plate, so that the earphone shell is located between the connecting clamp plate and the connecting guide clamp block, and then start the first motor to drive the rotating shaft to rotate, so that the conveyor belt rotates, and the connecting clamp plate moves to below the connecting plate. At this time, the guide bevel block is squeezed and moved downward by the connecting plate, and the first spring is squeezed and contracted. When the guide bevel block moves downward, the squeezing guide column moves, and the second spring is squeezed and contracted, so that the connecting guide clamp block is close to the earphone shell, and the connecting guide clamp block and the connecting clamp plate cooperate to clamp the earphone shell through the action force of the third spring.

[0007] In a preferred embodiment of the present invention, the unloading assembly includes a second motor and a rotating plate, the front part of the connecting plate is connected to the second motor, the output shaft of the second motor is connected to the rotating plate, the rotating plate and the connecting plate are rotatably connected, when the inner wall of the sound cavity is unqualified in coating, the second motor is controlled to start, the rotating plate is rotated to close the connecting plate, so that the earphones with unqualified coating cannot be separated from the connecting splint, and are moved to the nozzle again with the connecting splint for re-coating.

[0008] In a preferred embodiment of the present invention, the detection component includes a first cylinder and a detection head. The first cylinder is connected to the upper left portion of the connecting frame, the detection head is connected to the telescopic end of the first cylinder, and the second motor is connected to the detection head through wires. When the coated earphone shell moves to the detection head, the first cylinder is started and the position of the detection head is adjusted so that the detection head can detect the coating condition of the inner wall of the earphone sound cavity.

[0009] In a preferred embodiment of the present invention, the coating assembly includes a second cylinder, a fixed frame, a third motor, a screw, a movable frame, a connecting pipe and a nozzle. The second cylinder is connected to the right rear portion of the connecting frame, the fixed frame is connected to the telescopic end of the second cylinder, the lower right side of the fixed frame is connected to the third motor, the output shaft of the third motor is connected to the screw, the screw is rotatably connected to the fixed frame, the movable frame is threadedly connected to the screw, the movable frame is slidably connected to the fixed frame, the movable frame is connected to the connecting pipe, the front side of the connecting pipe is threadedly connected to the nozzle, the third motor is started to drive the screw to rotate, so that the movable frame moves, and the nozzle moves.

[0010] In a preferred embodiment of the present invention, a receiving assembly is further included, which includes a receiving box and a hose. The receiving box is clamped on the rear side of the lower part of the connecting frame, and a water pump is provided on the rear side of the right part of the receiving box. A hose is clamped between the water pump and the connecting pipe. After the excess sound-absorbing material flows out from the bottom of the earphone, it falls into the receiving box, and then the hose is clamped and matched with the connecting pipe, and then the water pump is started to make the sound-absorbing material in the receiving box flow back into the connecting pipe through the hose.

[0011] In a preferred embodiment of the present invention, the hose is a telescopic tube.

[0012] In a preferred embodiment of the present invention, a heating wire is also included, and a plurality of heating wires are connected inside the receiving box.

[0013] In a preferred embodiment of the present invention, a storage box is further included, and the storage box is clamped on the front side of the lower part of the connecting frame.

[0014] In a preferred embodiment of the present invention, a soft cushion is also included, and the storage box is internally connected to the soft cushion.

[0015] Compared with the prior art, the present invention has the following advantages: 1. When the detection head detects that the coating on the inner wall of the sound cavity is unqualified, the present invention controls the second motor to start, so that the rotating plate rotates to close the connecting plate, so that the earphones with unqualified coating cannot be separated from the connecting splint, and move to the nozzle again with the connecting splint for re-coating, thereby achieving the effect of being able to detect the coating condition of the inner wall of the earphone sound cavity, and being able to re-coat the inner wall of the earphone sound cavity when the coating is incomplete, thereby ensuring the production quality of the earphone.

[0016] 2. The present invention rotates the conveyor belt to move the connecting clamp to the bottom of the connecting plate. At this time, the guide bevel is squeezed by the connecting plate and moves downward, and the first spring is squeezed and contracted. When the guide bevel moves downward, the extrusion guide column moves, and the second spring is squeezed and contracted, so that the connecting guide clamp is close to the earphone shell. Through the action of the third spring, the connecting guide clamp cooperates with the connecting clamp to clamp the earphone shell, thereby achieving the effect of being able to quickly, conveniently and continuously load the earphones and improve the efficiency of earphone coating.

[0017] 3. After the present invention is transported to the notch of the connecting plate again through the connecting clamp, the first spring rebounds and the guide bevel is reset. Then the second spring rebounds and the guide column is reset, so that the connecting guide clamp moves away from the earphone and the earphone is separated from the connecting clamp, thereby achieving the effect of automatically unloading the earphone and improving the coating efficiency of the earphone.

[0018] 4. The present invention starts the third motor to drive the screw to rotate, so that the movable frame moves, and drives the nozzle to move, so as to achieve the effect of being able to adjust the height of the nozzle to adapt to different types of headphones.

[0019] 5. In the present invention, after the excess sound-absorbing material flows out from the bottom of the earphone, it falls into the receiving box, so that the heating wire is heated to prevent the sound-absorbing material from solidifying. Then, the hose and the connecting pipe are clamped together, and then the water pump is started to make the sound-absorbing material in the receiving box flow back into the connecting pipe through the hose, thereby achieving the effect of recycling the sound-absorbing material and reducing the waste of the sound-absorbing material.

[0020] 6. After the coated earphones of the present invention are separated from the connecting splint, the earphones fall into the storage box, and the soft pads cushion the earphones, so that the earphones can be stored and the subsequent transportation of the earphones is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a schematic diagram of a first partial three-dimensional structure of the present invention.

[0023] Figure 3 It is a schematic diagram of a second partial three-dimensional structure of the present invention.

[0024] Figure 4 It is a schematic diagram of a third partial three-dimensional structure of the present invention.

[0025] Figure 5 It is a schematic diagram of a fourth partial three-dimensional structure of the present invention.

[0026] Figure 6 It is a schematic diagram of a fifth partial three-dimensional structure of the present invention.

[0027] Figure 7 It is a schematic diagram of the sixth partial three-dimensional structure of the present invention.

[0028] Figure 8 It is an exploded view of the seventh partial three-dimensional structure of the present invention.

[0029] Fig. 9 It is a cross-sectional view of the eighth partial three-dimensional structure of the present invention.

[0030] Fig.10It is a ninth partial three-dimensional structure cross-sectional view of the present invention.

[0031] Among them, the above-mentioned drawings include the following figure marks: 1, connecting frame, 2, first motor, 3, conveyor belt, 4, connecting clamp, 5, guide bevel block, 6, first spring, 7, guide column, 8, second spring, 9, connecting guide clamp, 10, third spring, 11, connecting plate, 12, second motor, 13, rotating plate, 14, first cylinder, 15, detection head, 16, second cylinder, 17, fixed frame, 18, third motor, 19, screw rod, 20, moving frame, 21, receiving box, 210, heating wire, 22, hose, 23, connecting pipe, 24, nozzle, 25, storage box, 250, cushion. DETAILED DESCRIPTION

[0032] Although the present invention may be described with respect to a particular application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those of ordinary skill in the art will recognize that terms such as above, below, upward, downward, etc. are used to describe the drawings and do not represent limitations on the scope of the present invention as defined by the appended claims. Any numerical designations such as first or second are merely exemplary and are not intended to limit the scope of the present invention in any way.

[0033] A device for coating the inner wall of the sound cavity of an earphone with a sound-absorbing material, such as Figure 1-Figure 10 As shown, it includes a connecting frame 1, a feeding assembly, a unloading assembly, a detection assembly and a coating assembly. The connecting frame 1 is provided with a feeding assembly, the feeding assembly is provided with a unloading assembly, the connecting frame 1 is also provided with a detection assembly, and a coating assembly is provided at the rear of the connecting frame 1.

[0034] like Figure 1 , Figure 3 and Figure 4 As shown, the feeding assembly includes a first motor 2, a conveyor belt 3, a connecting clamp plate 4, a guide bevel block 5, a first spring 6, a guide column 7, a second spring 8, a connecting guide clamp block 9, a third spring 10 and a connecting plate 11. The upper right part of the connecting frame 1 is connected to the first motor 2, and the front part of the connecting frame 1 is rotatably provided with two left and right rotating shafts, and the conveyor belt 3 is wound around the rotating shafts. The output shaft of the first motor 2 is connected to the rotating shaft on the right side, and twelve connecting clamp plates 4 are connected to the conveyor belt 3, and the connecting clamp plates 4 are all slidably connected to the guide bevel block 5. A first spring 6 is connected between the guide bevel blocks 5 and the connected connecting splints 4, a guide column 7 is slidably connected to the connecting splints 4, the guide columns 7 are squeezed and fitted with adjacent guide bevel blocks 5, a second spring 8 is connected between the guide columns 7 and the connected connecting splints 4, a connecting guide clamp 9 is slidably connected to the guide columns 7, a third spring 10 is connected between the connecting guide clamp 9 and the connected guide columns 7, a connecting plate 11 is connected to the upper part of the connecting frame 1, and the guide bevel blocks 5 are squeezed and fitted with the connecting plate 11.

[0035] like Figure 1 , Figure 3 and Figure 5 As shown, the unloading assembly includes a second motor 12 and a rotating plate 13. The front of the connecting plate 11 is connected to the second motor 12, and the rotating plate 13 is connected to the output shaft of the second motor 12. The rotating plate 13 is rotatably connected to the connecting plate 11.

[0036] like Figure 1 and Figure 3 As shown, the detection assembly includes a first cylinder 14 and a detection head 15. The first cylinder 14 is connected to the upper left part of the connecting frame 1, the detection head 15 is connected to the telescopic end of the first cylinder 14, and the second motor 12 is connected to the detection head 15 through wires.

[0037] like Figure 1 , Figure 6 , Figure 7 and Figure 8 As shown, the coating assembly includes a second cylinder 16, a fixed frame 17, a third motor 18, a screw 19, a movable frame 20, a connecting pipe 23 and a nozzle 24. The second cylinder 16 is connected to the right rear portion of the connecting frame 1, the fixed frame 17 is connected to the telescopic end of the second cylinder 16, the third motor 18 is connected to the lower right side of the fixed frame 17, the screw 19 is connected to the output shaft of the third motor 18, the screw 19 is rotatably connected to the fixed frame 17, the movable frame 20 is threadedly connected to the screw 19, the movable frame 20 is slidably connected to the fixed frame 17, the movable frame 20 is connected to the connecting pipe 23, and the nozzle 24 is threadedly connected to the front side of the connecting pipe 23.

[0038] When using the present invention, firstly, the connecting frame 1 is placed on the sound-absorbing material coating area of ​​the inner wall of the earphone sound cavity, and then the staff is asked to place the earphone shell on the connecting clamping plate 4 located at the notch of the connecting plate 11, so that the earphone shell is located between the connecting clamping plate 4 and the connecting guide clamping block 9, and then the first motor 2 is started to drive the rotating shaft to rotate, so that the conveyor belt 3 rotates, so that the connecting clamping plate 4 moves to the bottom of the connecting plate 11, and at this time, the guiding inclined block 5 is squeezed by the connecting plate 11 and moves downward, and the first spring 6 is squeezed and contracted. When the guiding inclined block 5 moves downward, the squeezing guide column 7 moves. The second spring 8 is squeezed and contracted, so that the connecting guide clamp 9 is close to the earphone shell. Through the force of the third spring 10, the connecting guide clamp 9 cooperates with the connecting clamp plate 4 to clamp the earphone shell. Then, the conveyor belt 3 conveys the connecting clamp plate 4 to the right to the nozzle 24, so that the nozzle 24 is aligned with the earphone shell, and then the second cylinder 16 is started to push the fixing frame 17 to move, so that the nozzle 24 is close to the inner wall of the earphone sound cavity, and the sound-absorbing material is passed into the nozzle 24 through the connecting pipe 23, so that the nozzle 24 coats the sound-absorbing material on the inner wall of the earphone sound cavity, and the excess sound-absorbing material is discharged from the nozzle 24. The liquid flows out from the bottom of the earphone, thereby enabling the earphone to be quickly, conveniently and continuously loaded, thereby improving the efficiency of earphone coating. When the coated earphone shell moves to the detection head 15, the first cylinder 14 is started, and the position of the detection head 15 is adjusted, so that the detection head 15 detects the coating condition of the inner wall of the earphone sound cavity. After the detection is completed, the connecting clamp 4 is further conveyed to the notch of the connecting plate 11. At this time, the first spring 6 rebounds, the guide bevel 5 is reset, and then the second spring 8 rebounds, the guide column 7 is reset, so that the connecting guide clamp 9 is away from the earphone, so that the earphone The connecting splint 4 is separated, so that the earphone can be automatically unloaded and the earphone coating efficiency is improved. When the detection head 15 detects that the inner wall of the sound cavity is unqualified, the second motor 12 is controlled to start, so that the rotating plate 13 rotates to close the connecting plate 11, so that the earphone with unqualified coating cannot be separated from the connecting splint 4, and moves to the nozzle 24 again with the connecting splint 4 for re-coating, thereby playing the role of being able to detect the coating condition of the inner wall of the earphone sound cavity, and can be re-coated when the inner wall of the earphone sound cavity is not fully coated, so as to ensure the production quality of the earphone. When coating the inner wall of the earphone sound cavity, the third motor 18 can be started according to the position of the earphone sound cavity opening to drive the screw 19 to rotate, so that the moving frame 20 moves, and the nozzle 24 moves, so that the height of the nozzle 24 can be adjusted to adapt to different types of earphones. When coating the inner wall of the earphone sound cavity, the nozzle 24 of the appropriate model can also be replaced on the connecting pipe 23 according to the earphone model.

[0039] like Figure 1 and Fig. 9As shown, it also includes a receiving assembly, which includes a receiving box 21, a heating wire 210 and a hose 22. The receiving box 21 is clamped on the lower rear side of the connecting frame 1, and a water pump is provided on the right rear side of the receiving box 21. A hose 22 is clamped between the water pump and the connecting pipe 23. The hose 22 is a telescopic tube to facilitate maintaining the connection. Eight heating wires 210 are connected inside the receiving box 21.

[0040] After the excess sound-absorbing material flows out from the bottom of the earphone, it falls into the receiving box 21, heating the heating wire 210 to prevent the sound-absorbing material from solidifying. Then, the hose 22 and the connecting pipe 23 are snap-fitted together, and the water pump is started to make the sound-absorbing material in the receiving box 21 flow back into the connecting pipe 23 through the hose 22, thereby recycling the sound-absorbing material and reducing the waste of the sound-absorbing material.

[0041] like Figure 1 and Fig.10 As shown, it also includes a storage box 25 and a cushion 250 . The storage box 25 is clamped on the front side of the lower part of the connecting frame 1 , and the interior of the storage box 25 is connected to the cushion 250 .

[0042] After the coated earphone is separated from the connecting clamp plate 4, the earphone falls into the storage box 25, and the soft pad 250 cushions the earphone, thereby playing a role in storing the earphone and facilitating the subsequent transportation of the earphone.

[0043] Although the present disclosure has been described with respect to only a limited number of embodiments, those skilled in the art having benefit of this disclosure will appreciate that various other embodiments can be devised without departing from the scope of the present invention. Accordingly, the scope of the present invention should be limited only by the appended claims.

Claims

1. A device for coating the inner wall of a sound cavity of an earphone with a sound-absorbing material, characterized in that: The invention comprises a connecting frame (1), a feeding assembly, a discharging assembly, a detection assembly and a coating assembly. The connecting frame (1) is provided with a feeding assembly capable of conveying earphone shells, the feeding assembly is provided with a discharging assembly capable of discharging the earphone shells, the connecting frame (1) is also provided with a detection assembly capable of detecting the coating condition of the earphones, and the rear part of the connecting frame (1) is provided with a coating assembly capable of adapting to different models of earphones.

2. A device for coating the inner wall of the sound cavity of an earphone with a sound-absorbing material according to claim 1, characterized in that: The feeding assembly comprises a first motor (2), a conveyor belt (3), a connecting clamp plate (4), a guide inclined block (5), a first spring (6), a guide column (7), a second spring (8), a connecting guide clamp block (9), a third spring (10) and a connecting plate (11). The first motor (2) is connected to the upper right part of the connecting frame (1). The front part of the connecting frame (1) is rotatably provided with two left and right rotating shafts, and the conveyor belt (3) is wound between the rotating shafts. The output shaft of the first motor (2) is connected to the rotating shaft on the right side. The conveyor belt (3) ) are connected to a plurality of connecting splints (4), each connecting splint (4) is slidably connected to a guide inclined block (5), each guiding inclined block (5) is connected to a first spring (6) with the connected connecting splint (4), each connecting splint (4) is slidably connected to a guide column (7), each guiding column (7) is extruded and matched with an adjacent guiding inclined block (5), each guiding column (7) is connected to a second spring (8) with the connected connecting splint (4), each guiding column (7) is slidably connected to a connecting guide column (7), The clamp block (9) and the connecting guide clamp block (9) are connected to the connecting guide column (7) with a third spring (10). The upper part of the connecting frame (1) is connected to a connecting plate (11). The guiding inclined blocks (5) are pressed and matched with the connecting plate (11), so that the staff can place the earphone shell on the connecting clamp plate (4) located at the notch of the connecting plate (11), so that the earphone shell is located between the connecting clamp plate (4) and the connecting guide clamp block (9). Then, the first motor (2) is started to drive the rotating shaft to rotate, so that the conveyor belt (3) rotates, so that the connecting clamp plate (4) moves to the bottom of the connecting plate (11). At this time, the guiding inclined block (5) is pressed and moved downward by the connecting plate (11), and the first spring (6) is pressed and contracted. When the guiding inclined block (5) moves downward, the pressing guide column (7) moves, and the second spring (8) is pressed and contracted, so that the connecting guide clamp block (9) is close to the earphone shell. Through the action force of the third spring (10), the connecting guide clamp block (9) and the connecting clamp plate (4) cooperate to clamp the earphone shell.

3. A device for coating the inner wall of the sound cavity of an earphone with a sound-absorbing material according to claim 2, characterized in that: The unloading assembly comprises a second motor (12) and a rotating plate (13); the front part of the connecting plate (11) is connected to the second motor (12); the output shaft of the second motor (12) is connected to the rotating plate (13); the rotating plate (13) is rotatably connected to the connecting plate (11); when the inner wall of the sound cavity is not coated properly, the second motor (12) is controlled to start, so that the rotating plate (13) rotates to close the connecting plate (11), so that the earphones with unqualified coating cannot be separated from the connecting clamping plate (4), and are re-coated with the moving connecting clamping plate (4).

4. A device for coating the inner wall of the sound cavity of an earphone with a sound-absorbing material according to claim 3, characterized in that: The detection component comprises a first cylinder (14) and a detection head (15); the first cylinder (14) is connected to the upper left part of the connecting frame (1); the detection head (15) is connected to the telescopic end of the first cylinder (14); the second motor (12) is connected to the detection head (15) through an electric wire; when the coated earphone shell moves to the detection head (15), the first cylinder (14) is started, and the position of the detection head (15) is adjusted so that the detection head (15) detects the coating condition of the inner wall of the earphone sound cavity.

5. A device for coating the inner wall of the sound cavity of an earphone with a sound-absorbing material according to claim 4, characterized in that: The coating assembly comprises a second cylinder (16), a fixed frame (17), a third motor (18), a screw rod (19), a movable frame (20), a connecting pipe (23) and a nozzle (24). The right rear part of the connecting frame (1) is connected to the second cylinder (16), the telescopic end of the second cylinder (16) is connected to the fixed frame (17), the lower right side of the fixed frame (17) is connected to the third motor (18), the output shaft of the third motor (18) is connected to the screw rod (19), the screw rod (19) is rotatably connected to the fixed frame (17), the movable frame (20) is threadedly connected to the screw rod (19), the movable frame (20) is slidably connected to the fixed frame (17), the movable frame (20) is connected to the connecting pipe (23), the front side of the connecting pipe (23) is threadedly connected to the nozzle (24), the third motor (18) is started to drive the screw rod (19) to rotate, so that the movable frame (20) moves, and the nozzle (24) moves.

6. A device for coating the inner wall of the sound cavity of an earphone with a sound-absorbing material according to claim 5, characterized in that: The invention also comprises a receiving assembly, which comprises a receiving box (21) and a hose (22). The receiving box (21) is clamped on the lower rear side of the connecting frame (1). A water pump is arranged on the right rear side of the receiving box (21). A hose (22) is clamped between the water pump and the connecting pipe (23). After the excess sound-absorbing material flows out from the bottom of the earphone, it falls into the receiving box (21). Then, the hose (22) is clamped and matched with the connecting pipe (23), and the water pump is started to make the sound-absorbing material in the receiving box (21) flow into the connecting pipe (23) again through the hose (22).

7. A device for coating the inner wall of the sound cavity of an earphone with a sound-absorbing material according to claim 6, characterized in that: The hose (22) is a telescopic tube.

8. A device for coating the inner wall of the sound cavity of an earphone with a sound-absorbing material according to claim 6, characterized in that: It also includes a heating wire (210), and a plurality of heating wires (210) are connected inside the receiving box (21).

9. A device for coating the inner wall of the sound cavity of an earphone with a sound-absorbing material according to claim 8, characterized in that: It also includes a storage box (25), and the storage box (25) is clamped on the front side of the lower part of the connecting frame (1).

10. A device for coating the inner wall of the sound cavity of an earphone with a sound absorbing material according to claim 9, characterized in that: It also includes a soft pad (250), and the storage box (25) is internally connected to the soft pad (250).

Images